If it’s only officially playable through an emulator I wonder why didn’t just use a modern game engine to make something in a pixel art style? This is definitely more interesting though
Do they advertise it as a Game Boy Color game anywhere? I wouldn’t be surprised if they can’t (or rather don’t want to risk it) for trademark reasons
Edit: The game page itself doesn’t mention it but the article has information on how it was made and by who so they must have got the information somehow, maybe the developer talked about it